text: Guardiola was Messi's mentor from 2008 to 2012, winning two Champions League titles in 2009 and 2011?
classes:  No, guardiola served as manager for Messi's club from 2008 to 2012.  Also, guardiola served as manager for Messi's club from 2008 to 2012.  Yes, guardiola served as manager for Messi's club from 2008 to 2012.